Now, here's some of the other roles:

Orphans:

If you are looking to be an orphan in the show, then you should be as angry looking and resentful as possible, because you have to channel your inner hatred towards the evil Miss Hannigan, and other than that look according to the song scene (sad song, sad look. Happy song, happy look. surprising scene, shocked expression).

Lily St. Regis:

Lily St. Regis is Rooster's (Hannigan's brother and partner in crime) girlfriend, and she is a stuck-up, dimwitted, greedy, and whiny woman who is named after a hotel in the movie. If you want to be her, act like an airhead.

This will be continued soon!